示例#1
0
        public void Collections()
        {
            Common.Reset();
            using (Database database = Database.Get(Common.DatabaseName))
            {
                database.Add("Doc", "<Doc/>");
                Element elem = database.GetDocument("Doc").Root;
                Assert.IsNotNull(elem);

                // Add content
                List <int> numbers = new List <int>();
                using (new Updates())
                {
                    for (int c = 0; c < 10; c++)
                    {
                        elem.Append(String.Format("<A x='{0}'><B y='{1}'>{2}</B><C>{3}</C></A>",
                                                  c, c * 2, c * 3, c * 4));
                        numbers.Add(c);
                    }
                }

                // Create and attach a dictionary
                PersistentDictionary <int, string> dictionary = new PersistentDictionary <int, string>(
                    new PersistentKvpCollectionAttribute()
                {
                    Query            = ".", ItemQuery = "./A",
                    KeyAttributeName = "x", ValueElementName = "C"
                });
                dictionary.Attach(elem);
                CollectionAssert.AreEqual(numbers, dictionary.Keys);
                CollectionAssert.AreEqual(numbers.Select(n => (n * 4).ToString()), dictionary.Values);

                // Create and attach a list
                PersistentList <int> list = new PersistentList <int>(
                    new PersistentCollectionAttribute()
                {
                    Query = ".", ItemQuery = "./A/B"
                });
                list.Attach(elem);
                CollectionAssert.AreEqual(numbers.Select(n => n * 3), list);

                // Change the database (remove every other)
                for (int c = 9; c >= 0; c -= 2)
                {
                    elem.Child(c).Remove();
                    numbers.RemoveAt(c);
                }
                Manager.Default.FetchAll();
                CollectionAssert.AreEqual(numbers, dictionary.Keys);
                CollectionAssert.AreEqual(numbers.Select(n => (n * 4).ToString()), dictionary.Values);
                CollectionAssert.AreEqual(numbers.Select(n => n * 3), list);

                // Change the dictionary and attempt to store
                dictionary.Add(20, (20 * 4).ToString());
                Assert.Throws(Is.InstanceOf <Exception>(), dictionary.Store);

                // Refetch and verify
                dictionary.Fetch();
                CollectionAssert.AreEqual(numbers, dictionary.Keys);
                CollectionAssert.AreEqual(numbers.Select(n => (n * 4).ToString()), dictionary.Values);
            }
        }